Machine for sharpening and similar operations.



N. SCHNUR.

MACHINE FOR SHARPENING AND SlMILAR OPERATIONS.

' APPLICATlON FILED NOV-20,1915.

Patented Feb.- 1, 1916.

2 SHEETSSHEET I.

THE COLUMBIA PLANOGRAPH co., WASHINGTON, D. C

N. SCHNUR.

MACHINE FOR SHARPENING AND SIMILAR OPERATIONS.

APPLICATION FILED NOV. 20, 1915.

1,170,1 16; Patented Feb. 1, 1916.

2 SHEETS-SHEET 2- 64 'IIIIIIIIIIIIII' NICHOLAUS SCHNUR, OFELIZABETH,1\TEW JERSEY.

MACHINE FOR SHARPENING AND SIMILAR OPERATIONS.

To all cohom it may concern:

Be it known that I, NICHOLAUS SoHNUR,

a citizen of the United States, and resident of Elizabeth, county ofUnion, and State of New Jersey, have invented certain new and usefulImprovements in Machines for Sharpening and Similar Operations, of whichthe following is a specification.

This invention relates to a machine that is designed to be used forsubjecting plates or sheets to abrasion or polishing by passing saidplate or sheet over an element, and is particularly adapted forsharpening blades, this machine being of the type in which thesharpening device, so called in this specification for the purpose ofidentification, and the blade are supported in sliding relation so thatone can be slid on the other.

The invention is designed particularly as a machine for sharpening razorblades, although it is adapted for sharpening other forms of blades, infact it can be adapted for the purpose of polishing and in similarprocesses.

The machine is designed to be used as a honing machine for razor blades,and it is so described in this specification so as to make its operationclear, and it provides a holder for the blade and a holder for the hone,at least one of these being tilted so that the blade and the hone, bybeing pressed toward each other and having this tilting action, areforced to a position where the blade lies flat on the stone and the flatposition is maintained during the whole travel of the blade along thehone so that an even edge is secured, which overcomes the unevenness inhand honing which is very often due to the operator unconsciouslytilting the razor blade on the hone which, if done even to a slightextent, does not give as good a result as when the razor blade is heldflat on the hone.

The machine is further designed to provide a blade holder which providesa side motion to the blade so that the blade travels diagonally on thehone, first one way and then the other, being turned over at .the endsof the stroke and having means for preventing too rapid a reversal oftheblade so that the edge of the blade comes down lightly on the hone andis not injured.

The form of machine shown in the drawings accompanying thisspecification is adapted for honing the ordinary type of razor, and hasmeans for holding the handle Specification of Letters Patent.

Patented Feb. 1, 1916.

Application filed November 20, 1915. SerialNo. 62,452.

in an ope 1 Position, but in a manner to permlt its quick attachment ordetachment.

The machine is also designed to be adjustable so thatit can be used withhones of different lengths. The means for turning the blade and forproviding the sliding motion are also adjustable for a long or shortstroke as desired, according to the length of the hone.

The machine is illustrated in the accompanying drawings in which oneembodiment of the invention is shown, which, however, can be altered tomeet varying conditions, to receive difierent forms of plates or blades,and constructed with various combinations of parts to bring about themovements required in the manipulation of the blade.

In the drawings Figure 1 is a top view of the machine with the razorinserted in the holder provided for it, and Fig. 2 is an end view of themachine shown in Fig. I. Fig. 3 isa detail view showing the front of theblade holder, the hone being illustrated in section. Fig. 4 is a sectionon line 4:, a in Fig. 3. Fig. 5 is a detail view showing a device formaintaining the razor blade of an ordinary form of razor in position,and Fig. 6 is a side view of one of the abutments used to turn the bladeholder over at the end of a stroke.

The machine that is illustrated consists of a base 10 which is ofsuitable form and may be provided, if desired, with the openings 11 tomake it lighter in weight, and can be provided with suitable legs 12 forsecuring it to a table if necessary. The machine is provided with ablade holder anda hone that are in sliding relation and at least one ofwhich ean tilt, and one manner of providing this form of machine isillustrated in these drawings in which the hone 13 is preferablyarranged within a case or box 14 which has, at its ends, projectionssuch as the knife edges 15 which rest in the recess 16 of thestandards17. The standards are preferably fastened bv means of screwslS whichscrew into the table 10 and pass through slots 19 in the bottom part 20of the standards 17 This provides for an adjustment of the hone towardand from the razor holder. Adjacent to and parallel with the hone is arod 21 supported at its ends in suitable brackets 22. On the rod is asleeve 23 which slides on the rodand is substantially T-shaped, havingan arm'24 extending from it, the arm 24 having means thereon for holdinga blade so that the blade can be slid along. the hone and'also have aside motion, the preferred form of providing such motion being byarranging a slide 25 within a bore 26 of the arm 24. The arm 24 isslotted above and below the bore, the upper slot 27 receiving the neck28 of a carr1age29, the carriage havlng bearings 30 on its ends, thesehearings carryinga rod 31 which is adapted to oscillate in the bearings30, the forward end of the rod being provided with a suitable clamp 32,this clamp having a recess 33 to receive the tang 34 of a razor, theblade 35 of the razor resting on the hone. The tang is secured in. anysuitable way, in the drawing a screw 36 beingshown as-the medium forholding the tang 34 in place.

The forwardand outer edges of the clamp 32 are rounded on both the topand'bottom The slide 25 is provided with arecess into,

which the head 44 of a post 45 fits, the head 44 being usually made sothat it springs into place and can be removed by giving it a positivejerk, the post projecting through the lower slot 46 in the arm 24.-Tliepost 45 is arranged 011 the end of a springv arm 47 which swings onthe pivot 48, the outer end 49, to which the post 45 is secured, havinga constant tendency to springupward so that it holds the arm 24 up andyieldingly presses upward so as to force the sleeve 23 to'turn on therod 21 to-force'the blade 35 of the razor on the hone. It will beevident that other means of sliding and pressing on the blade holder canbe used, but the spring arm47 is simple and provides the necessary sidemotion to the razor blade holder and also propels the blade holder alongthe rod, 21. One manner of reciprocating the spring arm 47 is by meansof a swiveled stud'49 which receives the end of aconnecting rod 50 whichhas, at its end, an eye 51 fitting on the right-angled end 52 of a crank53. The crank 53 slides through the end of the shaft 54 and isadjustable therein, being held in desired positions by means of asuitable set screw 55. In this way'the throw of the crank 53 can beregulated. The shaft 54 is mounted in a bearing 54 and is provided witha suitable operating means, in the form shown this beinghand means andcomprisinga wheel 56 against'which a plate 57 is placed, the plate57havingslots 581 and 59 passing over thestud 60 and-theclamping screw61, so that the throw of the handle 62. can be regulated.

In sharpening an ordinary razor the handle 63 must be secured in place,and to provide a ready and quick means of attaching and detaching it, Iarrange a spring loop 64 over which the two sides of the handle 63 arepassed, the loop being preferably made from a sheet of metal, whichsheet passes through the end of the rod 31 and is thus ciprocate on itspivot- 48, and since the spring'arm 47 also causes the razor. blade tobe pressed down against the hone, the blade holder is moved so thatthe'sleeve 23 thereof slides along the rod 21 andat the same time thecarriage 29 slides on the arm 24 and the razor is thus given twomotions, namely, it passes edge first along the hone and at the sametime is given the side motion due to thefaet that the hone is straight,and the spring arm 47' swinging on the'pivot 48, describes,- with itsend,-thearc of acircle. This path of travel of the end of the spring armcauses the carriage 29 to be carried backward and forward on the arm 24as the arm is slid. When the blade holder gets near the end of a stroke,the clamp 32 is engaged at one of its curved faces 37 with the innerface 39 of one of the abutments 40, and it is turned over, the back ofthe blade resting on the hone during the turning movement. The weight ofthe clamp 32, which is rather heavy, assists in causing the continuedturning of the blade holder, after it has passed beyond the vertical,through its engagement with the abutment 40, but any excessive droppingof the blade is pre vented by reason-of the wing or fan 65 whichprovides a wind or air resistance just sufiic'ient to permit the razorblade to'be -de posited lightly against the hone in beginning its returnstroke. This reversal of the blade takes place at the end of eachstroke, as will be evident, and aconstant honing is possible, theturning of the blade being automatic and gentle, the blade being slid intwo directions as above described, that is, having a side motion inaddition to itsmotion longitudinally of the hone, and the tilting honeis acted upon by the blade so that the blade and the hone lie so thatthe edge of the blade is parallel with the surface of the hone, and thiseven contact is maintained for the full length of travel of the blade. Ihave found that this machine provides a good edge on a razor blade,doesit quickly and is inexpensiveboth to'make and maintain.

It will 'be'evident that modifications can be incorporated in themachine to vary the shape and disposition of the various parts, andwhile a sharpening process is described in this specification, themachine can be used for grinding or polishing articles, and while inthis specification and claims the hone is broadly termed a sharpeningele ment it may be a polishing or abrading surface.

Having thus described my invention, 1 claim:

1. A sharpening machine comprising a hone mounted so that it can tilt,an arm slidably supported adjacent to the hone, a carriage sliding onthe arm, a spring arm swinging on one end and having its other endpivotally attached to the carriage, means for oscillating the springarm, and means on the carriage for holding a blade.

2. A sharpening machine comprising a hone mounted so that it can tilt,an arm slidably supported adjacent to the hone, a carriage sliding onthe arm, a spring arm swinging on one end and having its other endpivotally attached to the carriage, means for oscillating the springarm, means on the carriage for holding a blade, and abutments againstWhich the blade holding means are pressed at the end of each stroke ofthe arm to turn the blade holder.

3. A sharpening machine comprising a hone, an arm sliding adjacent tothe hone, a carriage on the arm, a spring arm adapted to swing at oneend and having its other end pivotally connected to the carriage, apivoted blade holder on the carriage, means on the blade holder forsecuring a blade in position thereon, abutments against which the bladeholder is forced at the ends of the strokes to turn the blade holder,and means for adjustably securing said abutments toward and from eachother.

4. A sharpening machine comprising a hone, an arm sliding adjacent tothe hone, a carriage on the arm, a spring arm adapted to swing at oneend and having its other end pivotally connected to the carriage, apivoted blade holder on the carriage, means on the blade holder forsecuring a blade in position thereon, abutments against which the bladeholder is forced at the ends of the strokes toturn the blade holder,means for adjustably securing said abutments toward and from each other,and a wing on the blade holder to provide resistance against the turningof the blade holder.

5. A sharpening machine comprising a hone, means for supporting the honeso that it can tilt, a rod adjacent to the hone, a sleeve having an armthereon, the sleeve being rotatable and slidable on the rod, a carriageslidable in the hone in a direction transverse to the sliding movementof the arm, a blade holder on the carriage, means on the blade holderfor holding a blade, a wing on the blade holder having a projecting loopthereon, the blade holder having rounded edges, abutments in the path ofsaid rounded edges to turn the blade holder at the ends of the strokes,means for adjustably securing the abutments so that they can. be movedtoward and from each other, a spring arm pivoted at one end so that itcan swing and having its free end pivoted to the carriage, the armhaving a tendency to force the carriage to cause a blade held in theholder to engage the hone, and means for swinging the spring arm.

In testimony that I claim the foregoing, I hereunto set my hand, this18th day of November, 1915.

NICHOLAUS SCHNUR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

